Success compiling R v 1.8.0

[Michael L. Squires]

The "R" statistics port (ports/math/R-letter) is at version 1.7.0.  Being
the impatient type I tried compiling the recently released 1.8.0 using
the same Makefile (with 1.7 changed to 1.8) and a new MD5 value, and
had no new problems compiling.

R v.1.7 and v 1.8 trigger a bug in GCC (internal compiler error) and the
workaround is to wait for the bug to trigger, then compile that particular
piece of code using "-O2" rather than "-O", and then execute "make" again.

Mike Squires